Oh, DUH!!! We forgot the most obvious NEED for tens of thousands of coupe owners here. This will be a gold mine if you can get it done. A SUNROOF with glass that fits the car! Very few will mess up that center spine to put one in. If you can get the glass to match that center spine somehow and keep it affordable, I am sure you would sell a TON. Or bring back the T-tops. Even two small sunroofs to go in each side of the spine. Something to let the sun in!